I use Dr Clay's cleaning recipe for SCT corrector plates for everything. If it doesn't harm the UHTC coatings on my LX then I assume it's OK for everything. Asimov, pure Isopropal alcohol can be ordered from your local chemist and will be more cost effective if you buy it by the litre. Dr Clays cleaning mix recipe is at
http://www.arksky.org/asoclean.htm